If that is the very best Ulthuan can send at the moment, I'm afraid you'd wish you'd stayed back in Ulthuan with that army.
Silver Helms vs. Hangunners = dead silverhelms
Unit of Swordmaster vs. Mortar = dead swordmasters
a Dragon vs Cannons = dead dragon
Lots of Spearelves vs. infantry with detachments = dead spearelves
Archers vs. nothing = no kills at all
Dragon Princes vs. Hellblaster = dead dragon princes
Bolt Throwers vs. pegasus captain = dead Bolt Throwers
Just to show you how your High Elves might get slaughtered if they ever set foot upon the Empire again